HK61EA033 – RECTIFIER BOARD (1186788)

If your Carrier, Bryant, or Payne electric furnace is not activating the heat strips, the rectifier board may have failed. This board converts AC voltage to DC to power the heat relays. Common failure on electric furnace systems.

Specs: AC to DC rectifier board, OEM Carrier part

Replaces: 1186788, HK61EA033, HK61EA003, 1171780

Fits: Carrier/Bryant/Payne electric furnaces and air handlers with DC relay heat control

In stock at Open To Public HVAC Parts in Dallas. We test parts at the counter before you buy. Call or text (214) 340-9421.

Specs

• TypeCarrier-platform AC-to-DC rectifier board
• OEM CompatibilityCarrier

Cross-reference numbers

This part replaces the following OEM and aftermarket numbers:

• 1186788
• HK61EA033

Not sure if your number matches? Call (214) 340-9421 or bring the old part in — bench-testing is free.

Fits these models

• Carrier-platform rectifier board — converts AC to DC for DC-coil relays and solenoid valves on Carrier / Bryant equipment
• Verify exact part number cross-reference to your unit

How does a heat sequencer work?

A small bimetallic heater inside the sequencer gets 24V on a heat call from the thermostat. The heat slowly warms a bimetal disc that closes successive contact sets over 30-90 seconds — energizing each heat strip in sequence to prevent a simultaneous current spike that would trip the breaker.

How do I test a heat sequencer?

Apply 24V to the coil terminals (no load). Wait 30-90 seconds — you should hear individual contacts click closed in sequence. Use a multimeter for continuity across each load terminal pair. If one stage never closes, replace.

SPST vs DPST vs DPDT vs TPST — what's the difference?

- SPST = single pole, single throw (1 contact set, switches 1 strip) - DPST = double pole, single throw (2 contacts, switches 2 strips simultaneously) - DPDT = double pole, double throw (2 contacts with NO + NC positions) - TPST = triple pole, single throw (3 contacts, switches 3 strips simultaneously)

Why won't my heat strips come on?

Test the sequencer first — bad sequencer = no signal to the strips. Also check: thermostat call on W terminal, 24V at sequencer coil during heat call, line voltage on strip side, intact heater elements (continuity test each strip).